Cool Interchange in Sharjah

National Paint Roundabout in Sharjah, AE

Zhongshan Square

Zhongshan (中山) Square (广场), Dalian (大连)

Zhongshan Square was built by the Russians in 1898, who named it Nikolayevskaya Ploshad (Nikolai's Square).  The Japanese called it "Ohiroba" (Large Plaza).  Finally, the Chinese named it Zhongshan Square in 1945 after Sun Zhongshan (孫中山) (aka Sun Yat-sen 孫逸仙).  Ten roads meet here.

Zhongshan is also the name of a city in Guangdong province

Dupont Circle

Dupont Circle in Washington has 10 streets that intersect. This was part of L'Enfant's original design, although then it was called Pacific Circle. "The neighborhood is centered around the traffic circle, which is divided between two counterclockwise roads. The outer road serves all the intersecting streets, while access to the inner road is limited to through traffic on Massachusetts Avenue. Connecticut Avenue passes under the circle via a tunnel; vehicles on Connecticut Avenue can access the circle via service roads that branch from Connecticut near N Street and R Street.  The park within the circle is a gathering place for those wishing to play chess on the permanent stone chessboards."

Brilliant!

Los Alamitos Traffic Circle

This is one of the largest, busiest roundabouts in the US, handling 60,000 cars per day in Long Beach.  The inner island is about 360 feet in diameter.  Four major roads meet here.  Another 2 streets stop at the outer circle.

How to fix the Arc de Triomphe

Traffic around the Arc de Triomphe in Paris is insane, because of poor planning. Here is my suggestion for fixing it.

First, split the the roundabout into two parts, the outer circle and the inner circle. The inner circle would be used only by traffic from the Champs Elysees/Grand-Armee. All other traffic would have to use the outer circle.

There would be 2 intersections on either side of the Arc, and there would need to be 3 stoplights at each intersection. On green, incoming traffic from the Champs Elysees could enter, and could choose either the inner circle or outer circle. Synchronized with this, a green would allow traffic in the inner circle to exit. When these are red, the outer circle light would be green, and the outer traffic could either turn right to exit, go straight, or enter the inner circle.

Roundabout in Normal, Illinois